CN115324499B - Automatic grouting floating shoe device for oil well construction - Google Patents
Automatic grouting floating shoe device for oil well construction Download PDFInfo
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- CN115324499B CN115324499B CN202211256332.7A CN202211256332A CN115324499B CN 115324499 B CN115324499 B CN 115324499B CN 202211256332 A CN202211256332 A CN 202211256332A CN 115324499 B CN115324499 B CN 115324499B
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- wall
- barrel
- spout
- sleeve
- shoe
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/14—Casing shoes for the protection of the bottom of the casing
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
Abstract
The invention discloses an automatic grouting floating shoe device for oil well construction, and belongs to the technical field of automatic grouting floating shoes. The invention is used for solving the problems that the external structure of the floating shoe is damaged and damaged, the floating shoe is not easy to disassemble and maintain, and the overall replacement causes higher cost; the liquid outlet of the existing float shoe lacks a protective structure; impurities in the well easily enter the inside of the floating shoe, so that internal blockage and structural damage are caused; the spring part exposes outside in the inside float shoe, and grout is remained through producing easily, reduces spring part life's technical problem. The invention comprises an outer cylinder body, wherein a butt joint sleeve opening is arranged at the bottom end of the outer cylinder body in a penetrating mode, and a first sliding groove is arranged on the inner wall of the outer cylinder body in the axial direction. The invention realizes the modularization of the external structure of the floating shoe, reduces the maintenance cost caused by the external damage of the floating shoe, forms a plurality of groups of different axial connection stress, enhances the external structure strength of the floating shoe, and avoids the problems that the floating shoe component is damaged and directly bounces or disintegrates, and the floating shoe component is damaged and is difficult to be partially disassembled and replaced, thereby generating larger cost.
Description
Technical Field
The invention relates to the technical field of automatic grouting floating shoes, in particular to an automatic grouting floating shoe device for oil well construction.
Background
The float shoe is one of the petroleum drilling equipment accessories and is a necessary tool for well cementation construction. The float shoe is divided into cement structure and metal construction, and the float shoe generally cup joints at casing string end, makes guide shoe, casing shoe and valve body integrative device, plays guide shoe and back pressure valve's effect, and the float shoe is used for leading the casing string to go down into the well along the pit shaft smoothly, places the sleeve pipe foot and inserts the wall of a well stratum, reduces the resistance of going into the well for grout when preventing the cementing returns. The float shoe can be used for common technical casing and oil layer casing, and can also be used for deep wells, ultra-deep wells and special process wells;
the existing floating shoes have some disadvantages when in use: when the floating shoes descend in the oil well, the external structures of the floating shoes touch the inner wall of the oil well, so that the external structures of the floating shoes are damaged and damaged, the floating shoes are not easy to disassemble and maintain, and the overall replacement causes higher cost; the liquid outlet of the existing float shoe is lack of a protective structure, and when the float shoe descends in an oil well, impurities in the oil well easily enter the float shoe, so that internal blockage and structural damage are caused; spring parts in the floating shoes are exposed outside, cement paste is easy to remain after passing, and the service life of the spring parts is shortened;
in view of the above technical drawbacks, a solution is proposed.
Disclosure of Invention
The invention aims to provide an automatic grouting floating shoe device for oil well construction, which solves the problems that the external structure of a floating shoe is damaged and damaged due to the fact that the external structure of the floating shoe touches the inner wall of an oil well during the falling of the floating shoe in the oil well, the floating shoe is not easy to disassemble and maintain, and the overall replacement causes higher cost.
The purpose of the invention can be realized by the following technical scheme: an automatic grouting floating shoe device for oil well construction comprises an outer barrel body, wherein a butt joint sleeve opening is formed in the bottom end of the outer barrel body in a penetrating mode, a first sliding groove is formed in the inner wall of the outer barrel body in the axial direction, an inner barrel body is sleeved in an inner cavity of the outer barrel body in a sliding mode, a first sliding block connected with the first sliding groove is arranged on the outer wall of the inner barrel body, a valve cavity is arranged inside the inner barrel body, a valve body is installed inside the valve cavity, a locking mechanism is arranged at the top of the outer wall of the outer barrel body, a base plate is connected to the barrel wall of the top end of the outer barrel body in a threaded mode, and a conical head is connected to the top end of the base plate in a threaded mode;
the locking mechanism is including setting up the ring channel on outer barrel, the rubber latch closure is installed to the outer inslot joint of ring channel, the inside pull rod that is equipped with to extend to in the outer barrel inner chamber that runs through of ring channel, pull rod one end is equipped with the pull ring that extends to in the ring channel, the pull rod other end is equipped with the locking piece with interior barrel joint, the outer wall top of interior barrel is equipped with the locked groove with the locking piece butt joint.
Preferably, the inner wall of the butt joint sleeve opening is provided with sleeve threads, the annular groove is concavely formed in the inner and outer cylinder walls at the top of the outer cylinder body, the pull rods are provided with a plurality of groups and are arranged along the annular groove in an array mode, and the middle of the pull rod body is provided with a first compression spring clamped with the outer cylinder body.
Preferably, the top of conical head runs through and has seted up outer spout, the inner wall axial of outer spout has seted up the multiunit second spout, interior barrel top is equipped with the interior spout that cup joints with outer spout, be equipped with the second slider of being connected with the second spout on the outer wall of interior spout, the multiunit the outer wall annular array of spout in the second slider edge.
Preferably, a shunting mechanism is erected at the top of the inner wall of the outer nozzle and comprises a connecting frame, a shunting frame is arranged on the bottom wall of the connecting frame, and a sealing plate is rotatably connected to the top of the connecting frame; the upper and lower cross-section fixed mounting of backing plate has the screw thread lug of being connected with outer barrel and conical head, outer spout inner wall top is equipped with the annular frame with the shrouding contact, the axis of rotation of being connected is rotated with the shrouding to link top symmetry frame, cup joint the torque spring with shrouding and link joint on the axis body of axis of rotation.
Preferably, the bottom of the adjacent surface of the sealing plate is symmetrically provided with limiting blocks, the sealing plate is of a semicircular structure, the flow distribution frame is of an isosceles triangular prism structure, and the vertex angle of the flow distribution frame faces the inner nozzle.
Preferably, the valve body includes the sliding shaft, the support frame has been cup jointed at the both ends of sliding shaft, the second compression spring has been cup jointed in the middle part of sliding shaft, folding sleeve has been cup jointed on second compression spring's surface, folding sleeve includes the multiunit barrel holder, and installs the rubber sleeve on the outer wall of barrel holder.
Preferably, the top of the valve cavity is communicated with the inner nozzle, a feed inlet communicated with the butt-joint sleeve opening is arranged at the bottom of the valve cavity in a penetrating mode, the diameter of the cavity of the valve cavity is gradually increased from two ends to the middle, the two groups of support frames are fixedly connected with the inner walls of openings at two ends of the valve cavity respectively, and the support frames are of a cross structure.
Preferably, the valve body is sleeved on a shaft body, close to one end of the feed inlet, of the sliding shaft, a sealing sleeve connected with the inner wall of the valve cavity is arranged on the side edge of the bottom of the valve body, the diameters of the barrel frames are gradually decreased from bottom to top and are sleeved with each other, a third sliding block and a third sliding groove are arranged on the outer bottom wall and the inner top wall of the barrel frame respectively, the rubber sleeve is fixedly connected with the top of the outer wall of each group of the barrel frames, a crease is arranged on the sleeve body of the rubber sleeve, and two ends of the folding sleeve are fixedly connected with the valve body and a support frame close to the inner spout respectively.
The invention has the beneficial effects that:
(1) According to the invention, the thread lug on the base plate assists the outer cylinder body to be in threaded connection with the conical head, so that the modularization of the outer structure of the floating shoe is realized, and the maintenance cost caused by the damage of the outer part of the floating shoe is reduced; the first sliding chute and the first sliding block are used for assisting the outer cylinder body and the inner cylinder body to be sleeved with each other, so that the inner and outer structures of the floating shoe are preliminarily butted and fixed; a second sliding block on the inner cylinder body is sleeved with a second sliding groove on the conical head, so that second butt joint and fixation between the inner cylinder body and the external structure of the floating shoe are realized; when the pull ring is stressed to pull the pull rod outwards, the locking block axially slides along the pull rod and extrudes the first compression spring, the locking block is separated from the locking groove, the release between the inner cylinder and the outer cylinder is realized, when the external force of the pull ring is finished, the first compression spring resets to push the locking block to reset and be clamped with the locking groove, the third butt joint fixation is formed between the inner cylinder and the outer cylinder, a plurality of groups of locking mechanisms synchronously operate to strengthen the locking strength and prevent accidents, and the rubber ring is clamped in the annular groove to form a protective layer outside the locking mechanisms; the outer cylinder body is in threaded connection with the floating hoop through a butt joint sleeve opening and a sleeve thread, and the inner cylinder body is extruded in the outer cylinder body to form fourth butt joint fixation; the inner cylinder body is combined with the axial force which is fixed by sliding and inserting along the outer cylinder body and the conical head, the axial force is connected between the conical head and the cushion plate and the outer cylinder body in a threaded manner, the axial force is locked between the inner cylinder body and the outer cylinder body by the locking mechanism, and the extrusion force of the inner cylinder body between the outer cylinder body and the floating hoop is formed to form a plurality of groups of different axial connection receiving forces, so that the connection strength among the outer cylinder body, the cushion plate, the conical head, the inner cylinder body and the floating hoop of the floating shoe is enhanced, the floating shoe is prevented from being contacted with a well wall in the descending process in well cementation, the floating shoe assembly is damaged and directly broken or disassembled, the floating shoe component is difficult to partially disassemble and replace, and the problem of higher cost is caused;
(2) The cement paste sprayed out of the inner nozzle is preliminarily split in half through the splitting frame, the cement paste extrudes the sealing plates along the inner nozzle, the sealing plates are stressed to extrude the torsion springs and rotate and expand along the axial direction of the rotating shaft until the limiting blocks on the two groups of sealing plates extrude each other, a V-shaped structure is formed at the position of the outer nozzle to guide the cement paste to be split into the oil well, and when the cement paste drainage is finished, the rotating shaft resets and rotates through the torsion springs to reset the sealing plates to close the outer nozzle to form an external anti-backflow structure; during the period that the floating shoe descends along the oil well, the sealing plate closes the outer nozzle, so that impurities in the oil well are prevented from entering the floating shoe, the inner part of the floating shoe is prevented from being blocked by the impurities, and the damage to the inner part of the floating shoe is avoided;
(3) The folding sleeve is sleeved on the outer sides of the second compression spring and the sliding shaft, so that the phenomenon that cement paste is attached to the second compression spring when passing through the second compression spring to damage the second compression spring is avoided; when the valve body is stressed to extrude the second compression spring and the folding sleeve along the sliding shaft, the plurality of groups of barrel frames are mutually sleeved and accommodated in a sliding mode through the third sliding block and the third sliding groove, the stressed rubber sleeve is folded in half through the crease, and the folding sleeve moves, folds and contracts along with the valve body; when the external stress of the valve body is finished, the second compression spring pushes the valve body to reset along the sliding shaft, and the folding sleeve is pulled by the valve body to reset and expand.
Drawings
The invention will be further described with reference to the accompanying drawings;
FIG. 1 is a perspective view of the overall structure of the present invention;
FIG. 2 is a schematic bottom view of the outer barrel of the present invention;
FIG. 3 is a partial cross-sectional structural schematic view of the outer barrel of the present invention;
FIG. 4 is a schematic diagram of the structure of FIG. 3 at A according to the present invention;
FIG. 5 is an enlarged view of area B of FIG. 3 in accordance with the present invention;
FIG. 6 is a schematic cross-sectional view of the inner cylinder according to the present invention;
FIG. 7 is a schematic view of the valve body of the present invention;
fig. 8 is an enlarged view of the area C of fig. 7 according to the present invention.
Illustration of the drawings: 1. an outer cylinder; 101. butting a sleeve opening; 102. threading the sleeve; 103. a first chute; 2. a latch mechanism; 201. an annular groove; 202. rubber buckles; 203. a pull ring; 204. a first compression spring; 205. a locking block; 206. a pull rod; 3. a base plate; 301. a threaded projection; 4. a conical head; 401. an outer spout; 402. an annular frame; 403. a second chute; 5. a flow distribution mechanism; 501. a connecting frame; 502. a flow distribution frame; 503. closing the plate; 504. a limiting block; 505. a rotating shaft; 6. an inner cylinder; 601. a first slider; 602. locking the groove; 603. a second slider; 604. an inner spout; 605. a feed inlet; 606. a valve cavity; 7. a valve body; 701. folding the sleeve; 702. a support frame; 703. a second compression spring; 704. a sliding shaft; 705. a barrel frame; 706. a rubber sleeve; 707. a third slider; 708. sealing sleeves; 709. and (6) folding.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The first embodiment is as follows:
this embodiment is used for solving the float shoe in the oil well decline during period, the touch of float shoe external structure and oil well inner wall causes the damage of float shoe external structure, and difficult dismantlement is maintained, and whole the change causes the problem of higher cost.
Referring to fig. 1, 2, 3 and 5, the invention relates to an automatic grouting float shoe device for oil well construction, which comprises an outer cylinder 1, wherein a butt joint sleeve opening 101 is formed at the bottom end of the outer cylinder 1 in a penetrating manner, a first sliding groove 103 is formed in the inner wall of the outer cylinder 1 along the axial direction, an inner cylinder 6 is sleeved in an inner cavity of the outer cylinder 1 in a sliding manner, a first sliding block 601 connected with the first sliding groove 103 is arranged on the outer wall of the inner cylinder 6, and the first sliding groove 103 and the first sliding block 601 assist the outer cylinder 1 and the inner cylinder 6 to be mutually sleeved to form a primary butt joint fixation between the inner structure and the outer structure of the float shoe; the inside of interior barrel 6 is equipped with valve pocket 606, and the internally mounted of valve pocket 606 has valve body 7, and the outer wall top of outer barrel 1 is equipped with latched device 2, and latched device 2 is including setting up the ring channel 201 on outer barrel 1, and rubber latch 202 is installed to the outer inslot joint of ring channel 201, and ring channel 201 is inside to run through and is equipped with the pull rod 206 that extends to in the 1 inner chamber of outer barrel, and threaded connection has backing plate 3 on the top section of thick bamboo wall of outer barrel 1, and the top threaded connection of backing plate 3 has conical head 4.
The inner wall of the butt joint sleeve opening 101 is provided with a sleeve thread 102, the outer cylinder body 1 is in threaded connection with the floating hoop through the butt joint sleeve opening 101 and the sleeve thread 102, and the inner cylinder body 6 is extruded in the outer cylinder body 1 to form fourth butt joint fixation; the annular groove 201 is concavely arranged on the top inner and outer cylinder walls of the outer cylinder body 1, the pull rods 206 are provided with a plurality of groups and are arranged along the annular groove 201 in an array manner, and the middle part of the rod body of the pull rod 206 is provided with a first compression spring 204 clamped with the outer cylinder body 1.
One end of the pull rod 206 is provided with a pull ring 203 extending into the annular groove 201, the other end of the pull rod 206 is provided with a locking block 205 clamped with the inner cylinder body 6, the top of the outer wall of the inner cylinder body 6 is provided with a locking groove 602 butted with the locking block 205, the locking block 205 is separated from the locking groove 602, the release between the inner cylinder body 6 and the outer cylinder body 1 is realized, when the external force of the pull ring 203 is finished, the first compression spring 204 resets to push the locking block 205 to reset and be clamped with the locking groove 602, and the third butt joint fixation is formed between the inner cylinder body 6 and the outer cylinder body 1; the top end of the conical head 4 is provided with an outer nozzle 401 in a penetrating manner, the inner wall of the outer nozzle 401 is provided with a plurality of groups of second sliding grooves 403 in the axial direction, the top of the inner cylinder 6 is provided with an inner nozzle 604 sleeved with the outer nozzle 401, the outer wall of the inner nozzle 604 is provided with a second sliding block 603 connected with the second sliding grooves 403, and the second sliding block 603 is sleeved with the second sliding grooves 403 on the conical head 4, so that the second butt joint and fixation between the inner cylinder 6 and the external structure of the floating shoe are realized; the sets of second slides 603 are arranged in an annular array along the outer wall of the inner nozzle 604.
Fixed axial force is interlude along outer barrel 1 and the sliding of cone 4 to barrel 6 in the combination, threaded connection's axial force between cone 4 and backing plate 3 and the outer barrel 1, the axial force of locking between the internal barrel 6 of latched device 2 and the outer barrel 1, the extrusion force of internal barrel 6 between outer barrel 1 and the float collar, constitute multiunit disalignment and receive power even, strengthen the outer barrel 1 of float shoe, backing plate 3, cone 4, joint strength between internal barrel 6 and the float collar, avoid the float shoe to touch with the wall of a well in the decline in-process, lead to the impaired direct of float shoe subassembly to jump garrulously or disintegrate, and the damage of float shoe part is difficult to the local change of disassembling, produce the problem of great cost.
Example two:
this embodiment is used for solving current float shoe liquid outlet and lacks protective structure, and when the float shoe descends in the oil well during, impurity gets into inside the float shoe easily in the well, causes inside jam and the impaired problem of structure.
Referring to fig. 1, 3 and 4, in the automatic grouting float shoe device for oil well construction of the present embodiment, a diversion mechanism 5 is erected at the top of the inner wall of an outer nozzle 401, the diversion mechanism 5 includes a connecting frame 501, a diversion frame 502 is installed on the bottom wall of the frame body of the connecting frame 501, and the diversion frame 502 primarily and semi-diverts the cement slurry sprayed out of an inner nozzle 604; the top of the connecting frame 501 is rotatably connected with a sealing plate 503, and the sealing plate 503 is unfolded at the outer nozzle 401 to form a V-shaped structure to guide cement slurry to flow into the oil well.
The upper and lower cross-section fixed mounting of backing plate 3 has screw thread lug 301 of being connected with outer barrel 1 and conical head 4, and outer spout 401 inner wall top is equipped with the annular frame 402 with shrouding 503 contact, and the symmetry frame is equipped with the axis of rotation 505 of being connected with shrouding 503 rotation in the link 501 top, cup joints the torsion spring with shrouding 503 and link 501 joint on the axis body of axis of rotation 505.
The bottom of the adjacent surface of the closing plate 503 is symmetrically provided with a limiting block 504, the closing plate 503 is in a semicircular structure, the flow distribution frame 502 is in an isosceles triangular prism structure, and the vertex angle of the flow distribution frame 502 faces the inner nozzle 604.
The flow distribution frame 502 preliminarily and semi-distributes the cement slurry sprayed out of the inner nozzle 604; cement paste extrudes the seal plates 503 along the inner nozzle 604, the seal plates 503 are stressed to extrude the torsion spring and axially rotate and expand along the rotating shaft 505 until the limit blocks 504 on the two sets of seal plates 503 are extruded mutually, and a V-shaped structure is formed at the outer nozzle 401 to guide the cement paste to be shunted into the oil well; during the float shoe descends along the oil well, the shrouding 503 is with outer spout 401 closed, prevents in the oil well impurity gets into the float shoe, avoids inside being blockked up by impurity of float shoe to and cause the damage of the inside part of float shoe.
Example three:
this embodiment is used for solving the inside spring part of float shoe and exposes outside, and grout produces easily when process and remains, reduces spring part life's problem.
Referring to fig. 1, 6, 7, and 8, in the automatic grouting float shoe device for oil well construction of the present embodiment, the valve body 7 includes a sliding shaft 704, two ends of the sliding shaft 704 are sleeved with supporting frames 702, a second compression spring 703 is sleeved in the middle of the sliding shaft 704, a folding sleeve 701 is sleeved on the surface of the second compression spring 703, the folding sleeve 701 is sleeved outside the second compression spring 703 and the sliding shaft 704, so as to prevent cement slurry from attaching to the second compression spring 703 when passing through, and thus the second compression spring 703 is damaged; the folding sleeve 701 comprises a plurality of sets of barrel holders 705, and rubber sleeves 706 are mounted on the outer walls of the barrel holders 705.
The top of the valve cavity 606 is communicated with the inner nozzle 604, the bottom of the valve cavity 606 is provided with a feed inlet 605 communicated with the butt-joint sleeve opening 101 in a penetrating manner, the diameter of the cavity of the valve cavity 606 gradually increases from two ends to the middle, the two groups of support frames 702 are fixedly connected with the inner walls of openings at two ends of the valve cavity 606 respectively, and the support frames 702 are in a cross structure.
The valve body 7 is sleeved on a shaft body of the sliding shaft 704 at one end close to the feed port 605, a sealing sleeve 708 connected with the inner wall of the valve cavity 606 is arranged on the side edge of the bottom of the valve body 7, the diameters of a plurality of groups of tube racks 705 are gradually decreased from bottom to top and are sleeved with each other, a third sliding block 707 and a third sliding groove are respectively arranged on the outer bottom wall and the inner top wall of each group of tube racks 705, the rubber sleeve 706 is fixedly connected with the top of the outer wall of each group of tube racks 705, a crease 709 is arranged on the sleeve body of the rubber sleeve 706, and two ends of the folding sleeve 701 are respectively connected and fixed with the valve body 7 and the support frame 702 close to the inner spout 604.
The folding sleeve 701 is sleeved outside the second compression spring 703 and the sliding shaft 704, and the folding sleeve 701 extends and contracts on the sliding shaft 704 along with the valve body 7 through the cylinder frame 705 and the rubber sleeve 706, so that the phenomenon that cement paste is attached to the second compression spring 703 when passing through and the second compression spring 703 is damaged is avoided.
As shown in fig. 1-8, the working process and principle of the present invention are as follows:
when the floating shoe is used, the outer cylinder body 1 is in threaded connection with the conical head 4 through the thread lug 301 on the base plate 3, so that the modularization of the outer structure of the floating shoe is realized, and the maintenance cost caused by the damage of the outer part of the floating shoe is reduced; the first sliding groove 103 and the first sliding block 601 assist the outer cylinder body 1 and the inner cylinder body 6 to realize mutual sleeve joint, and initial butt joint and fixation between the inner structure and the outer structure of the floating shoe are formed; the second sliding block 603 on the inner cylinder 6 is sleeved with the second sliding groove 403 on the conical head 4, so that the second butt joint and fixation between the inner cylinder 6 and the external structure of the floating shoe are realized; when the pull ring 203 is stressed to pull the pull rod 206 outwards, the locking block 205 axially slides along the pull rod 206 and extrudes the first compression spring 204, the locking block 205 is separated from the locking groove 602 to realize the release between the inner cylinder body 6 and the outer cylinder body 1, when the external force of the pull ring 203 is finished, the first compression spring 204 resets to push the locking block 205 to reset and tightly clamp the locking groove 602, a third butt joint fixation is formed between the inner cylinder body 6 and the outer cylinder body 1, and a plurality of groups of locking mechanisms 2 synchronously operate to strengthen the locking strength and prevent accidents, the rubber ring buckle 202 is clamped in the annular groove 201, and a protective layer is formed outside the locking mechanisms 2; the outer cylinder body 1 is in threaded connection with the floating hoop through a butt joint sleeve opening 101 and a sleeve thread 102, and the inner cylinder body 6 is extruded in the outer cylinder body 1 to form fourth butt joint fixation; the axial force of the inner cylinder 6 which is fixedly inserted along the sliding of the outer cylinder 1 and the conical head 4, the axial force of the conical head 4 which is in threaded connection with the base plate 3 and the outer cylinder 1, the axial force of the locking mechanism 2 which is used for locking the inner cylinder 6 and the outer cylinder 1, and the extrusion force of the inner cylinder 6 between the outer cylinder 1 and the floating hoop form a plurality of groups of different axial connection receiving forces, so that the connection strength between the outer cylinder 1 of the floating shoe, the base plate 3, the conical head 4, the inner cylinder 6 and the floating hoop is enhanced, the floating shoe is prevented from being contacted with a well wall in the descending process in well cementation, the floating shoe assembly is damaged and directly broken or disassembled, the floating shoe component is difficult to be partially disassembled and replaced, and the problem of higher cost is caused;
secondly, the cement paste sprayed out of the inner nozzle 604 is split in half primarily through the splitting frame 502, the cement paste extrudes the sealing plates 503 along the inner nozzle 604, the sealing plates 503 are stressed to extrude torsion springs and rotate and expand along the axial direction of the rotating shaft 505 until the limiting blocks 504 on the two groups of sealing plates 503 are extruded mutually, a V-shaped structure is formed at the outer nozzle 401 to guide the cement paste to be split into the oil well, and when the cement paste drainage is finished, the rotating shaft 505 resets and rotates through the torsion springs to reset the sealing plates 503 to close the outer nozzle 401, so that an external backflow prevention structure is formed; during the period that the floating shoe descends along the oil well, the sealing plate 503 closes the outer nozzle 401, so that impurities in the oil well are prevented from entering the floating shoe, the inner part of the floating shoe is prevented from being blocked by the impurities, and the parts in the floating shoe are prevented from being damaged;
step three, the folding sleeve 701 is sleeved on the outer sides of the second compression spring 703 and the sliding shaft 704, so that cement paste is prevented from being attached to the second compression spring 703 when passing through, and the second compression spring 703 is prevented from being damaged; when the valve body 7 is stressed to extrude the second compression spring 703 and the folding sleeve 701 along the sliding shaft 704, the multiple groups of barrel frames 705 are mutually slidably sleeved and accommodated through the third sliding block 707 and the third sliding groove, and the stressed rubber sleeve 706 is folded in half through the crease 709, so that the folding sleeve 701 moves along with the valve body 7 to be folded and contracted; when the external force on the valve body 7 is over, the second compression spring 703 pushes the valve body 7 to reset along the sliding shaft 704, and the folding sleeve 701 is pulled by the valve body 7 to reset and unfold.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The automatic grouting floating shoe device for oil well construction comprises an outer barrel body (1) and is characterized in that a butt joint sleeve opening (101) is formed in the bottom end of the outer barrel body (1) in a penetrating mode, a first sliding groove (103) is formed in the inner wall of the outer barrel body (1) in the axial direction, an inner barrel body (6) is sleeved in an inner cavity of the outer barrel body (1) in a sliding mode, a first sliding block (601) connected with the first sliding groove (103) is arranged on the outer wall of the inner barrel body (6), a valve cavity (606) is arranged inside the inner barrel body (6), a valve body (7) is installed inside the valve cavity (606), a locking mechanism (2) is arranged at the top of the outer wall of the outer barrel body (1), a base plate (3) is connected to the barrel wall of the top end of the outer barrel body (1) in a threaded mode, and a conical head (4) is connected to the top end of the base plate (3) in a threaded mode;
the locking mechanism (2) comprises an annular groove (201) arranged on the outer barrel (1), a rubber buckle (202) is installed in the outer groove of the annular groove (201) in a clamping mode, a pull rod (206) extending into the inner cavity of the outer barrel (1) penetrates through the annular groove (201), one end of the pull rod (206) is provided with a pull ring (203) extending into the annular groove (201), the other end of the pull rod (206) is provided with a locking block (205) clamped with the inner barrel (6), and the top of the outer wall of the inner barrel (6) is provided with a locking groove (602) butted with the locking block (205);
the inner wall of the butt joint sleeve opening (101) is provided with sleeve threads (102), the annular grooves (201) are concavely formed in the inner and outer cylinder walls at the top of the outer cylinder body (1), the pull rods (206) are provided with a plurality of groups and are arranged in an array mode along the annular grooves (201), and the middle of the rod body of each pull rod (206) is provided with a first compression spring (204) clamped with the outer cylinder body (1);
the top of conical head (4) is run through and is seted up outer spout (401), multiunit second spout (403) have been seted up to the inner wall axial of outer spout (401), interior barrel (6) top is equipped with interior spout (604) that cup joint with outer spout (401), be equipped with second slider (603) of being connected with second spout (403) on the outer wall of interior spout (604), multiunit the outer wall annular array of spout (604) is followed in second slider (603).
2. The automatic grouting float shoe device for oil well construction according to claim 1, characterized in that a shunt mechanism (5) is erected on the top of the inner wall of the outer nozzle (401), the shunt mechanism (5) comprises a connecting frame (501), a shunt frame (502) is installed on the bottom wall of the connecting frame (501), and a sealing plate (503) is rotatably connected to the top of the connecting frame (501); the upper and lower cross-section fixed mounting of backing plate (3) has screw thread lug (301) be connected with outer barrel (1) and conical head (4), outer spout (401) inner wall top is equipped with annular frame (402) with shrouding (503) contact, link (501) top symmetry frame is equipped with and rotates axis of rotation (505) of being connected with shrouding (503), cup joint the torsion spring with shrouding (503) and link (501) joint on the axis body of axis of rotation (505).
3. The automatic grouting float shoe device for oil well construction according to claim 2, characterized in that the bottom of the adjacent surface of the closing plate (503) is symmetrically provided with a limiting block (504), the closing plate (503) is in a semicircular structure, the diversion frame (502) is in an isosceles triangular prism structure, and the top angle of the diversion frame (502) faces to the inner spout (604).
4. The automatic grouting float shoe device for oil well construction according to claim 1, characterized in that the valve body (7) comprises a sliding shaft (704), supporting frames (702) are sleeved at both ends of the sliding shaft (704), a second compression spring (703) is sleeved at the middle part of the sliding shaft (704), a folding sleeve (701) is sleeved on the surface of the second compression spring (703), the folding sleeve (701) comprises a plurality of groups of barrel frames (705), and a rubber sleeve (706) is installed on the outer wall of the barrel frames (705).
5. The automatic grouting float shoe device for oil well construction according to claim 4, characterized in that the top of the valve cavity (606) is communicated with the inner spout (604), the bottom of the valve cavity (606) is provided with a feed inlet (605) communicated with the butt-joint sleeve opening (101) in a penetrating manner, the diameter of the cavity of the valve cavity (606) is gradually increased from two ends to the middle, two groups of the support frames (702) are respectively fixedly connected with the inner walls of the openings at the two ends of the valve cavity (606), and the support frames (702) are in a cross structure.
6. The automatic grouting float shoe device for oil well construction according to claim 5, characterized in that the valve body (7) is sleeved on a shaft body of a sliding shaft (704) near one end of the feed port (605), a sealing sleeve (708) connected with the inner wall of the valve cavity (606) is arranged on the side edge of the bottom of the valve body (7), the diameters of a plurality of groups of barrel racks (705) are gradually decreased from bottom to top and are sleeved with each other, a third sliding block (707) and a third sliding groove are respectively arranged on the outer bottom wall and the inner top wall of each barrel rack (705), the rubber sleeve (706) is fixedly connected with the top of the outer wall of each group of barrel racks (705), a crease (709) is arranged on the sleeve body of the rubber sleeve (706), and two ends of the folding sleeve (701) are respectively connected and fixed with the valve body (7) and a support frame (702) near the inner spout (604).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211256332.7A CN115324499B (en) | 2022-10-14 | 2022-10-14 | Automatic grouting floating shoe device for oil well construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211256332.7A CN115324499B (en) | 2022-10-14 | 2022-10-14 | Automatic grouting floating shoe device for oil well construction |
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| CN115324499B true CN115324499B (en) | 2022-12-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115949365B (en) * | 2023-03-14 | 2023-05-26 | 山东健源石油工程技术有限公司 | Pressure-bearing leakage-proof drill rod cement head and working method thereof |
| CN115977581B (en) * | 2023-03-20 | 2023-05-30 | 山东健源石油工程技术有限公司 | Automatic grouting floating shoe device and method for oil well construction |
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| CN115324499A (en) | 2022-11-11 |
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